CVE-2025-40125
Vulnerability Scoring
Analysis In Progress
CVE-2025-40125 Vulnerability Analysis & Exploit Details
CVE-2025-40125
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2025-40125 Details
Status: Awaiting Analysis
Published on: 12 Nov 2025, 11:15 UTC
CVSS Release:
CVE-2025-40125 Vulnerability Summary
CVE-2025-40125: In the Linux kernel, the following vulnerability has been resolved: blk-mq: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx In __blk_mq_update_nr_hw_queues() the return value of blk_mq_sysfs_register_hctxs() is not checked. If sysfs creation for hctx fails, later changing the number of hw_queues or removing disk will trigger the following warning: kernfs: can not remove 'nr_tags', no directory WARNING: CPU: 2 PID: 637 at fs/kernfs/dir.c:1707 kernfs_remove_by_name_ns+0x13f/0x160 Call Trace: remove_files.isra.1+0x38/0xb0 sysfs_remove_group+0x4d/0x100 sysfs_remove_groups+0x31/0x60 __kobject_del+0x23/0xf0 kobject_del+0x17/0x40 blk_mq_unregister_hctx+0x5d/0x80 blk_mq_sysfs_unregister_hctxs+0x94/0xd0 blk_mq_update_nr_hw_queues+0x124/0x760 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] nullb_device_submit_queues_store+0x92/0x120 [null_blk] kobjct_del() was called unconditionally even if sysfs creation failed. Fix it by checkig the kobject creation statusbefore deleting it.
Assessing the Risk of CVE-2025-40125
Access Complexity Graph
The exploitability of CVE-2025-40125 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2025-40125
No exploitability data is available for CVE-2025-40125.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2025-40125, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2025-40125, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2025-40125 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40125 does not impact data integrity.
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Availability:
None
CVE-2025-40125 does not affect system availability.
CVE-2025-40125 References
External References
- https://git.kernel.org/stable/c/06c4826b1d900611096e4621e93133db57e13911
- https://git.kernel.org/stable/c/4b97e99b87a773d52699521d40864f3ec888e9a6
- https://git.kernel.org/stable/c/4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed
- https://git.kernel.org/stable/c/6e7dadc5763c48eb3b9b91265a21f312599ebb2c
- https://git.kernel.org/stable/c/a8c53553f1833cc2d14175d2d72cf37193a01898
- https://git.kernel.org/stable/c/babc634e9fe2803962dba98a07587e835dbc0731
- https://git.kernel.org/stable/c/cc14ea21c4e658814d737ed4dedde6cd626a15ad
- https://git.kernel.org/stable/c/d5ddd76ee52bdc16e9f8b1e7791291e785dab032
CWE Common Weakness Enumeration
Unknown
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